package com.zzyl.framework.interceptor;

import com.zzyl.common.constant.HttpStatus;
import com.zzyl.common.exception.base.BaseException;
import com.zzyl.common.utils.StringUtils;
import com.zzyl.common.utils.UserThreadLocal;
import com.zzyl.framework.web.service.TokenService;
import io.jsonwebtoken.Claims;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class MemberInterceptor implements HandlerInterceptor {

    @Autowired
    private TokenService tokenService;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //如果不是controller请求，直接放行
        if (!(handler instanceof HandlerMethod)){
            return true;
        }
        //获取请求头的token
        String token = request.getHeader("authorization");

        //如果为空
        if(StringUtils.isBlank( token)){
            response.setStatus(HttpStatus.UNAUTHORIZED);
            throw new BaseException("请先登录");

        }

        //解析Token
        try {
            Claims claims = tokenService.parseToken(token);
            //解析成功，设置到ThreadLocal
            Long userId = Long.valueOf(String.valueOf(claims.get("memberId")));
            UserThreadLocal.set(userId);
        } catch (Exception e) {
            e.printStackTrace();
            //解析失败，响应401
            response.setStatus(HttpStatus.UNAUTHORIZED);
            throw new BaseException("登录认证失败，401");
        }

        //放行请求
        return true;
    }


    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserThreadLocal.remove();
    }
}
